Violin-bow.



T. KURTH.

VIOLIN BOW.

APPLICATION IILIID 11110.5, 19101 Patented Au 15, 1911.

COLUIIIA H-ANOOIIAPM C0,, WMNINGTON. D. C.

SA l llS PATENT @Flflltllfi THEODOR KURTH, OF BER-LIN, GERMANY.

VIOLIN-B (TN.

To all whom it may concern:

Be it known that l, Tl-rnonon Knirrn, manufacturer, a citizen of the German Empire, and resident of 14 Oramenburgerstrasse, Berlin, Germany, have invented certain new and useful Improvements in Violin-Bows; and it do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or fig ures of reference marked thereon, whi h form a part of this specification.

This invention relates to bows for stringed instruments and has for its object to provide means for tightening the hairs of the bow.

According to this invention the frog is fixed to the handle end of the bow and a screw is passed lengthwise up the handle and in the frog near the handle or under the frog, the said screw having a hook or equiv alent to which the hairs are attached the said hook being moved to and fro on the screw by turning it so as to produce greater or less tension on the hair, a second screw being arranged on the frog in connection with a wedge-like block by which the hairs can be gripped when the requisite tension has been acquired, the said hairs passing from the block to the hook advantageously at an angle to their fiat portion.

The screw in the handle or in the frog near the handle is one of the main features of the invention and has the advantage of more perfectly balancing the handle end of the bow than when it is arranged in the frog, far from the handle, the side weight of the frog when provided with a screw being liable to disturb the movements of the musicians hands which in the case of great artists are very sensitive.

In the accompanying drawing the figure is a vertical longitudinal sectional view of one end of a bow embodying my invention.

in said drawing a designates the finger end of the bow in which the screw Z) with head 0 is fitted the said screw having upon it a hook (Z over which the hairs e are placed. The frog f has a central opening arranged opposite an opening in the handle of the bow said openings allowing for the Specification of Letters Patent.

Application filed December 5, 1910.

Patented Aug.

Serial No. $95,731.

to-and-fro movements of the hook (Z. On the upper side of the frog is arranged a gripping device which serves to flatten the hairs and acts as an auxiliary tension after the hairs have been tensioned by the proper adjustment of the hook (Z. This device consists of a fine screw 9 arranged and so connected to a wedgeshaped block 72, over which the hairs 6 pass that the said hairs can be gripped or loosened by the block according to the movements of the screw. Owing to the relative positions of the wedge and hook, it will .be apparent, that, after the threads have been tensioned by adjusting the hook (Z, a further tensioning may be had by moving the wedge 7L toward the interior of the frog and the hairs are spread and clamped simultaneously between the wedge and frog.

This improved device is extremely light and the weight of the hook (Z is insufiicient to interfere with the balance of the bow.

What I claim and desire to secure by Letters Patent is 1. A violin bow comprising a stick, a frog fixed thereto, a member in said frog to which the hairs of the bow are attached, means to reciprocate said member longitudinally of the frog to vary the tension of the hairs, and an auxiliary tensioning device operable upon and engaging said hairs.

2, A violin bow comprising a stick, a frog fixed thereto, a member in said frog to which the hairs of the bow are attached, means to reciprocate said member longitudinally of the frog to vary the tension of the hairs, a wedge on which said hairs rest coeperating with the frog to grip the hairs.

3. A violin bow comprising a stick, a frog fixed thereto, a member in said frog to which the hairs of the how are attached, means to reciprocate said member longitudinally of the frog to vary the tension of the iairs, a wedge on which said hairs rest mounted in a plane out of the plane of movement of said member, said wedge movable toward the frog, whereby the hairs are gripped by the frog and wedge.

4. A violin bow comprising a stick, a frog fixed thereto, a screw rotatably mounted in the stick, a hook to which the hairs of the bow are secured mounted on the screw and projecting into the frog, a wedge on which the bow hairs rest mounted in the frog in as my invention, I have signed my name in front of and out of the plane of movement presence of tWo subscribing Witnesses. of said hook, and a screw connected to said 1 w A Wedge adapted to move the latter in a direorlHEODOR IX URTH' tion toward and from the hook, for the pur- Witnesses: pose specified. WOLDEMAR I-LiUr'r,

In testimony that I claim the foregoing HENRY HASPER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

